{"product_id":"bromocresol-green-cas-76-60-8","title":"Bromocresol Green | CAS 76-60-8 | Indicator Grade","description":"\u003cdiv style=\"margin-bottom: 28px;\"\u003e\n\u003cdiv style=\"background: #002147; padding: 10px 20px; margin-bottom: 0;\"\u003e\u003ch3 style=\"margin: 0; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 0.70em; font-weight: bold; letter-spacing: 0.12em; text-transform: uppercase; color: #fff;\"\u003eTechnical Specifications\u003c\/h3\u003e\u003c\/div\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 0.95em; border: 1px solid #e4e8f0; border-top: none; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 16px; font-weight: 600; color: #002147; width: 200px; border-bottom: 1px solid #e4e8f0; background: #f7f8fb; font-size: 0.95em; vertical-align: top;\"\u003eCAS Number\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 16px; color: #333; border-bottom: 1px solid #e4e8f0;\"\u003e76-60-8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 16px; font-weight: 600; color: #002147; width: 200px; border-bottom: 1px solid #e4e8f0; background: #f7f8fb; font-size: 0.95em; vertical-align: top;\"\u003eEC \/ EINECS Number\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 16px; color: #333; border-bottom: 1px solid #e4e8f0;\"\u003e200-972-8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 16px; font-weight: 600; color: #002147; width: 200px; border-bottom: 1px solid #e4e8f0; background: #f7f8fb; font-size: 0.95em; vertical-align: top;\"\u003eMDL Number\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 16px; color: #333; border-bottom: 1px solid #e4e8f0;\"\u003eMFCD00005874\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 16px; font-weight: 600; color: #002147; width: 200px; border-bottom: 1px solid #e4e8f0; background: #f7f8fb; font-size: 0.95em; vertical-align: top;\"\u003eSMILES\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 16px; color: #333; border-bottom: 1px solid #e4e8f0; word-break: break-all;\"\u003eCC1=C(C(=C(C=C1C2(C3=CC=CC=C3S(=O)(=O)O2)C4=CC(=C(C(=C4C)Br)O)Br)Br)O)Br\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 16px; font-weight: 600; color: #002147; width: 200px; border-bottom: 1px solid #e4e8f0; background: #f7f8fb; font-size: 0.95em; vertical-align: top;\"\u003eInChI\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 16px; color: #333; border-bottom: 1px solid #e4e8f0; word-break: break-all;\"\u003eInChI=1S\/C21H14Br4O5S\/c1-9-12(7-14(22)19(26)17(9)24)21(13-8-15(23)20(27)18(25)10(13)2)11-5-3-4-6-16(11)31(28,29)30-21\/h3-8,26-27H,1-2H3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 16px; font-weight: 600; color: #002147; width: 200px; border-bottom: 1px solid #e4e8f0; background: #f7f8fb; font-size: 0.95em; vertical-align: top;\"\u003eInChIKey\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 16px; color: #333; border-bottom: 1px solid #e4e8f0; word-break: break-all;\"\u003eFRPHFZCDPYBUAU-UHFFFAOYSA-N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 16px; font-weight: 600; color: #002147; width: 200px; border-bottom: 1px solid #e4e8f0; background: #f7f8fb; font-size: 0.95em; vertical-align: top;\"\u003ePubChem CID\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 16px; color: #333; border-bottom: 1px solid #e4e8f0;\"\u003e6451\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 16px; font-weight: 600; color: #002147; width: 200px; border-bottom: 1px solid #e4e8f0; background: #f7f8fb; font-size: 0.95em; vertical-align: top;\"\u003eMolecular Formula\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 16px; color: #333; border-bottom: 1px solid #e4e8f0;\"\u003eC₂₁H₁₄Br₄O₅S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 16px; font-weight: 600; color: #002147; width: 200px; border-bottom: 1px solid #e4e8f0; background: #f7f8fb; font-size: 0.95em; vertical-align: top;\"\u003eMolecular Weight\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 16px; color: #333; border-bottom: 1px solid #e4e8f0;\"\u003e698.01 g\/mol\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 16px; font-weight: 600; color: #002147; width: 200px; border-bottom: 1px solid #e4e8f0; background: #f7f8fb; font-size: 0.95em; vertical-align: top;\"\u003eMelting Point\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 16px; color: #333; border-bottom: 1px solid #e4e8f0;\"\u003e225 °C (dec.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 16px; font-weight: 600; color: #002147; width: 200px; border-bottom: 1px solid #e4e8f0; background: #f7f8fb; font-size: 0.95em; vertical-align: top;\"\u003eTransition Range\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 16px; color: #333; border-bottom: 1px solid #e4e8f0;\"\u003epH 3.8 (yellow) to pH 5.4 (blue)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 16px; font-weight: 600; color: #002147; width: 200px; border-bottom: 1px solid #e4e8f0; background: #f7f8fb; font-size: 0.95em; vertical-align: top;\"\u003eSolubility\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 16px; color: #333; border-bottom: 1px solid #e4e8f0;\"\u003eSoluble in ethanol, diethyl ether and ethyl acetate. Poorly soluble in water.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 16px; font-weight: 600; color: #002147; width: 200px; border-bottom: 1px solid #e4e8f0; background: #f7f8fb; font-size: 0.95em; vertical-align: top;\"\u003ePurity\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 16px; color: #333; border-bottom: 1px solid #e4e8f0;\"\u003eIndicator Grade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 16px; font-weight: 600; color: #002147; width: 200px; border-bottom: 1px solid #e4e8f0; background: #f7f8fb; font-size: 0.95em; vertical-align: top;\"\u003ePhysical Form\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 16px; color: #333; border-bottom: 1px solid #e4e8f0;\"\u003eYellow to light brown powder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 16px; font-weight: 600; color: #002147; width: 200px; border-bottom: 1px solid #e4e8f0; background: #f7f8fb; font-size: 0.95em; vertical-align: top;\"\u003eHS Code\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 16px; color: #333; border-bottom: 1px solid #e4e8f0;\"\u003e2934.99\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 16px; font-weight: 600; color: #002147; width: 200px; border-bottom: 1px solid #e4e8f0; background: #f7f8fb; font-size: 0.95em; vertical-align: top;\"\u003eShelf Life\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 16px; color: #333; border-bottom: 1px solid #e4e8f0;\"\u003eRetest period: 36 months from date of manufacture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 16px; font-weight: 600; color: #002147; width: 200px; background: #f7f8fb; font-size: 0.95em; vertical-align: top;\"\u003eStorage Conditions\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 16px; color: #333;\"\u003eStore in a cool, dry place in a tightly sealed container.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 28px;\"\u003e\n\u003cdiv style=\"background: #002147; padding: 10px 20px; margin-bottom: 0;\"\u003e\u003ch3 style=\"margin: 0; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 0.70em; font-weight: bold; letter-spacing: 0.12em; text-transform: uppercase; color: #fff;\"\u003eProduct Description \u0026amp; Scientific Applications\u003c\/h3\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding: 16px 20px; border: 1px solid #e4e8f0; border-top: none; font-family: Georgia, 'Times New Roman', serif; font-size: 0.95em; line-height: 1.65; color: #333;\"\u003e\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eBromocresol green\u003c\/strong\u003e (tetrabromo-m-cresolsulfonphthalein, BCG) is a sulfonphthalein pH indicator. Its colour changes from \u003cspan style=\"color:#a07c00;font-weight:600;\"\u003eyellow\u003c\/span\u003e at pH 3.8 to \u003cspan style=\"color:#1f4fa8;font-weight:600;\"\u003eblue\u003c\/span\u003e at pH 5.4, and it is \u003cspan style=\"color:#3d8a3a;font-weight:600;\"\u003egreen\u003c\/span\u003e at about pH 4.5. Its pK\u003csub\u003ea\u003c\/sub\u003e is about 4.8.\u003c\/p\u003e\n\u003cdiv style=\"margin:4px 0 18px 0;max-width:520px;font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;\"\u003e\n\u003cdiv style=\"height:20px;border-radius:4px;background:linear-gradient(to right,#e9c81c 0%,#e9c81c 12%,#5fa84a 50%,#2a5fc4 88%,#2a5fc4 100%);font-size:0;line-height:0;\"\u003e \u003c\/div\u003e\n\u003cdiv style=\"display:flex;justify-content:space-between;font-size:12px;color:#333;margin-top:3px;\"\u003e\n\u003cspan\u003epH 3.8 · yellow\u003c\/span\u003e\u003cspan\u003epH 4.5 · green\u003c\/span\u003e\u003cspan\u003epH 5.4 · blue\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eHow the colour changes.\u003c\/strong\u003e In the yellow form, the sulfonate group is ionised but the phenol is not. When the phenol also loses its proton, the dianion is blue. The two forms absorb at clearly different wavelengths, so the colour can also be measured by absorbance.\u003c\/p\u003e\n\u003cdiv style=\"margin:8px 0 18px 0;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-start;gap:2px;\"\u003e\n\u003cdiv style=\"display:flex;flex-direction:column;align-items:center;background:#fff6cc;border:1px solid #e0b800;border-radius:8px;padding:6px 8px 4px 8px;margin:4px;\"\u003e\n\u003csvg role=\"img\" style=\"max-width:100%;height:auto;\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" fill=\"none\" stroke=\"#000\" stroke-width=\"1.6\" width=\"270px\" height=\"250px\" viewbox=\"0 0 270 250\"\u003e\u003cpath d=\"M 148.1,51.0 L 122.4,65.8\"\u003e\u003c\/path\u003e\u003cpath d=\"M 122.4,65.8 L 96.9,50.9\"\u003e\u003c\/path\u003e\u003cpath d=\"M 96.9,50.9 L 96.9,26.5\"\u003e\u003c\/path\u003e\u003cpath d=\"M 96.9,50.9 L 71.1,65.7\"\u003e\u003c\/path\u003e\u003cpath d=\"M 96.8,56.0 L 75.5,68.2\"\u003e\u003c\/path\u003e\u003cpath d=\"M 71.1,65.7 L 50.4,53.6\"\u003e\u003c\/path\u003e\u003cpath d=\"M 71.1,65.7 L 71.1,95.2\"\u003e\u003c\/path\u003e\u003cpath d=\"M 71.1,95.2 L 48.2,108.4\"\u003e\u003c\/path\u003e\u003cpath d=\"M 71.1,95.2 L 96.7,110.1\"\u003e\u003c\/path\u003e\u003cpath d=\"M 75.5,92.7 L 96.7,105.0\"\u003e\u003c\/path\u003e\u003cpath d=\"M 96.7,110.1 L 122.4,95.3\"\u003e\u003c\/path\u003e\u003cpath d=\"M 122.4,95.3 L 148.1,110.2\"\u003e\u003c\/path\u003e\u003cpath d=\"M 148.1,110.2 L 148.0,139.9\"\u003e\u003c\/path\u003e\u003cpath d=\"M 143.7,112.8 L 143.6,137.3\"\u003e\u003c\/path\u003e\u003cpath d=\"M 148.0,139.9 L 173.5,154.9\"\u003e\u003c\/path\u003e\u003cpath d=\"M 173.5,154.9 L 173.2,184.4\"\u003e\u003c\/path\u003e\u003cpath d=\"M 169.0,157.4 L 168.8,181.8\"\u003e\u003c\/path\u003e\u003cpath d=\"M 173.2,184.4 L 194.8,197.1\"\u003e\u003c\/path\u003e\u003cpath d=\"M 173.2,184.4 L 147.5,198.9\"\u003e\u003c\/path\u003e\u003cpath d=\"M 145.3,197.7 L 145.1,223.2\"\u003e\u003c\/path\u003e\u003cpath d=\"M 149.7,197.7 L 149.5,223.2\"\u003e\u003c\/path\u003e\u003cpath d=\"M 147.5,198.9 L 122.1,183.9\"\u003e\u003c\/path\u003e\u003cpath d=\"M 122.1,183.9 L 99.1,197.0\"\u003e\u003c\/path\u003e\u003cpath d=\"M 122.1,183.9 L 122.3,154.4\"\u003e\u003c\/path\u003e\u003cpath d=\"M 126.5,181.4 L 126.7,157.0\"\u003e\u003c\/path\u003e\u003cpath d=\"M 122.3,154.4 L 96.8,139.4\"\u003e\u003c\/path\u003e\u003cpath d=\"M 148.1,110.2 L 173.7,95.4\"\u003e\u003c\/path\u003e\u003cpath d=\"M 173.7,95.4 L 173.6,65.9\"\u003e\u003c\/path\u003e\u003cpath d=\"M 178.1,92.9 L 178.0,68.4\"\u003e\u003c\/path\u003e\u003cpath d=\"M 173.6,65.9 L 199.3,51.1\"\u003e\u003c\/path\u003e\u003cpath d=\"M 199.3,51.1 L 224.9,65.8\"\u003e\u003c\/path\u003e\u003cpath d=\"M 199.3,56.2 L 220.5,68.3\"\u003e\u003c\/path\u003e\u003cpath d=\"M 224.9,65.8 L 225.0,95.3\"\u003e\u003c\/path\u003e\u003cpath d=\"M 225.0,95.3 L 199.4,110.1\"\u003e\u003c\/path\u003e\u003cpath d=\"M 220.6,92.8 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174.9,65.2\"\u003e\u003c\/path\u003e\u003cpath d=\"M 198.0,51.9 L 199.3,51.1 L 200.6,51.8\"\u003e\u003c\/path\u003e\u003cpath d=\"M 223.6,65.0 L 224.9,65.8 L 224.9,67.2\"\u003e\u003c\/path\u003e\u003cpath d=\"M 225.0,93.8 L 225.0,95.3 L 223.7,96.1\"\u003e\u003c\/path\u003e\u003cg style=\"font:12px sans-serif;fill:#000;stroke:none\"\u003e\u003ctext x=\"96.9\" y=\"25.5\" text-anchor=\"middle\"\u003eBr\u003c\/text\u003e\u003ctext x=\"49.2\" y=\"55.0\" text-anchor=\"end\"\u003eHO\u003c\/text\u003e\u003ctext x=\"42.5\" y=\"114.2\" text-anchor=\"middle\"\u003eBr\u003c\/text\u003e\u003ctext x=\"198.7\" y=\"203.6\" text-anchor=\"middle\"\u003eBr\u003c\/text\u003e\u003ctext x=\"147.3\" y=\"232.7\" text-anchor=\"middle\"\u003eO\u003c\/text\u003e\u003ctext x=\"93.3\" y=\"202.7\" text-anchor=\"middle\"\u003eBr\u003c\/text\u003e\u003ctext x=\"202.4\" y=\"141.4\" text-anchor=\"middle\"\u003eS\u003c\/text\u003e\u003ctext x=\"232.2\" y=\"140.5\" text-anchor=\"middle\"\u003eO\u003c\/text\u003e\u003ctext x=\"179.6\" y=\"138.8\" text-anchor=\"middle\"\u003eO\u003c\/text\u003e\u003ctext x=\"203.6\" y=\"171.4\" text-anchor=\"middle\"\u003eO⁻\u003c\/text\u003e\u003c\/g\u003e\u003c\/svg\u003e\u003cdiv style=\"font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;font-size:12px;font-weight:600;color:#8a6d00;margin-top:2px;\"\u003eYellow form (pH below 3.8)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;align-items:center;\"\u003e\u003cdiv style=\"display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:80px;max-width:108px;padding:0 4px;text-align:center;font-size:12px;line-height:1.3;\"\u003e\n\u003cdiv\u003e– H⁺\u003c\/div\u003e\n\u003cdiv style=\"font-size:30px;line-height:1;\"\u003e⇌\u003c\/div\u003e\n\u003cdiv\u003epK\u003csub\u003ea\u003c\/sub\u003e ≈ 4.8\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-direction:column;align-items:center;background:#e3edff;border:1px solid #2f6fd6;border-radius:8px;padding:6px 8px 4px 8px;margin:4px;\"\u003e\n\u003csvg role=\"img\" style=\"max-width:100%;height:auto;\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" fill=\"none\" stroke=\"#000\" stroke-width=\"1.6\" width=\"270px\" height=\"250px\" viewbox=\"0 0 270 250\"\u003e\u003cpath d=\"M 146.3,51.0 L 120.6,65.8\"\u003e\u003c\/path\u003e\u003cpath d=\"M 120.6,65.8 L 95.0,50.9\"\u003e\u003c\/path\u003e\u003cpath d=\"M 95.0,50.9 L 95.1,26.5\"\u003e\u003c\/path\u003e\u003cpath d=\"M 95.0,50.9 L 69.3,65.7\"\u003e\u003c\/path\u003e\u003cpath d=\"M 95.0,56.0 L 73.7,68.2\"\u003e\u003c\/path\u003e\u003cpath d=\"M 69.3,65.7 L 48.6,53.6\"\u003e\u003c\/path\u003e\u003cpath d=\"M 69.3,65.7 L 69.3,95.2\"\u003e\u003c\/path\u003e\u003cpath d=\"M 69.3,95.2 L 46.4,108.4\"\u003e\u003c\/path\u003e\u003cpath d=\"M 69.3,95.2 L 94.9,110.1\"\u003e\u003c\/path\u003e\u003cpath d=\"M 73.7,92.7 L 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124.7,181.4 L 124.9,157.0\"\u003e\u003c\/path\u003e\u003cpath d=\"M 120.5,154.4 L 95.0,139.4\"\u003e\u003c\/path\u003e\u003cpath d=\"M 146.3,110.2 L 171.9,95.4\"\u003e\u003c\/path\u003e\u003cpath d=\"M 171.9,95.4 L 171.8,65.9\"\u003e\u003c\/path\u003e\u003cpath d=\"M 176.3,92.9 L 176.2,68.4\"\u003e\u003c\/path\u003e\u003cpath d=\"M 171.8,65.9 L 197.5,51.1\"\u003e\u003c\/path\u003e\u003cpath d=\"M 197.5,51.1 L 223.0,65.8\"\u003e\u003c\/path\u003e\u003cpath d=\"M 197.5,56.2 L 218.7,68.3\"\u003e\u003c\/path\u003e\u003cpath d=\"M 223.0,65.8 L 223.2,95.3\"\u003e\u003c\/path\u003e\u003cpath d=\"M 223.2,95.3 L 197.6,110.1\"\u003e\u003c\/path\u003e\u003cpath d=\"M 218.8,92.8 L 197.6,105.1\"\u003e\u003c\/path\u003e\u003cpath d=\"M 197.6,110.1 L 200.0,132.0\"\u003e\u003c\/path\u003e\u003cpath d=\"M 204.4,139.3 L 225.6,138.6\"\u003e\u003c\/path\u003e\u003cpath d=\"M 204.2,134.9 L 225.5,134.2\"\u003e\u003c\/path\u003e\u003cpath d=\"M 197.2,134.6 L 182.9,133.0\"\u003e\u003c\/path\u003e\u003cpath d=\"M 196.7,139.0 L 182.4,137.4\"\u003e\u003c\/path\u003e\u003cpath d=\"M 200.5,142.6 L 200.0,161.9\"\u003e\u003c\/path\u003e\u003cpath d=\"M 120.6,95.3 L 120.6,65.8\"\u003e\u003c\/path\u003e\u003cpath d=\"M 116.2,92.8 L 116.2,68.3\"\u003e\u003c\/path\u003e\u003cpath d=\"M 120.5,154.4 L 146.2,139.9\"\u003e\u003c\/path\u003e\u003cpath d=\"M 197.6,110.1 L 171.9,95.4\"\u003e\u003c\/path\u003e\u003cpath d=\"M 93.6,109.4 L 94.9,110.1 L 96.2,109.4\"\u003e\u003c\/path\u003e\u003cpath d=\"M 170.4,154.1 L 171.7,154.9 L 171.6,156.3\"\u003e\u003c\/path\u003e\u003cpath d=\"M 147.0,198.2 L 145.7,198.9 L 144.4,198.2\"\u003e\u003c\/path\u003e\u003cpath d=\"M 171.8,67.4 L 171.8,65.9 L 173.1,65.2\"\u003e\u003c\/path\u003e\u003cpath d=\"M 196.2,51.9 L 197.5,51.1 L 198.8,51.8\"\u003e\u003c\/path\u003e\u003cpath d=\"M 221.8,65.0 L 223.0,65.8 L 223.1,67.2\"\u003e\u003c\/path\u003e\u003cpath d=\"M 223.2,93.8 L 223.2,95.3 L 221.9,96.1\"\u003e\u003c\/path\u003e\u003cg style=\"font:12px sans-serif;fill:#000;stroke:none\"\u003e\u003ctext x=\"95.1\" y=\"25.5\" text-anchor=\"middle\"\u003eBr\u003c\/text\u003e\u003ctext x=\"45.8\" y=\"55.0\" text-anchor=\"middle\"\u003eO⁻\u003c\/text\u003e\u003ctext x=\"40.7\" y=\"114.2\" text-anchor=\"middle\"\u003eBr\u003c\/text\u003e\u003ctext x=\"196.9\" y=\"203.6\" text-anchor=\"middle\"\u003eBr\u003c\/text\u003e\u003ctext x=\"145.5\" y=\"232.7\" text-anchor=\"middle\"\u003eO\u003c\/text\u003e\u003ctext x=\"91.5\" y=\"202.7\" text-anchor=\"middle\"\u003eBr\u003c\/text\u003e\u003ctext x=\"200.6\" y=\"141.4\" text-anchor=\"middle\"\u003eS\u003c\/text\u003e\u003ctext x=\"230.4\" y=\"140.5\" text-anchor=\"middle\"\u003eO\u003c\/text\u003e\u003ctext x=\"177.8\" y=\"138.8\" text-anchor=\"middle\"\u003eO\u003c\/text\u003e\u003ctext x=\"201.8\" y=\"171.4\" text-anchor=\"middle\"\u003eO⁻\u003c\/text\u003e\u003c\/g\u003e\u003c\/svg\u003e\u003cdiv style=\"font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;font-size:12px;font-weight:600;color:#1f4fa8;margin-top:2px;\"\u003eBlue form (pH above 5.4)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:12px;margin:4px 0 0 0;\"\u003e\u003cem\u003eThe yellow monoanion loses the phenolic proton to give the blue dianion.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eAcid–base titrations.\u003c\/strong\u003e Bromocresol green is used as a visual indicator in acid–base titrations. For example, the ISO standard method for the total acidity of industrial hydrochloric acid titrates the acid with sodium hydroxide in its presence.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSerum albumin.\u003c\/strong\u003e In the bromocresol green method, albumin binds the dye in an acidic buffer, and the absorbance of the bound dye gives the albumin concentration. The method is simple and fast. It reads albumin higher than electrophoresis and immunoassay do, because the dye also binds some globulins, including acute-phase proteins. For this reason some laboratories use bromocresol purple instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIon-pair methods for basic drugs.\u003c\/strong\u003e In an acidic buffer, protonated basic drugs form yellow ion pairs with the dye anion. The ion pair is extracted into chloroform or dichloromethane and measured by absorbance. This gives simple assays for drugs in tablets and capsules.\u003c\/p\u003e\n\u003cdiv style=\"margin:8px 0 18px 0;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-start;gap:2px;\"\u003e\n\u003cdiv style=\"display:flex;align-items:center;font-size:14px;padding:0 4px;\"\u003eR₃NH⁺\u003c\/div\u003e\n\u003cdiv style=\"display:flex;align-items:center;font-size:20px;padding:0 4px;\"\u003e+\u003c\/div\u003e\n\u003cdiv style=\"display:flex;align-items:center;\"\u003e\u003csvg role=\"img\" style=\"max-width:100%;height:auto;\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" fill=\"none\" stroke=\"#000\" stroke-width=\"1.6\" width=\"230px\" height=\"215px\" viewbox=\"0 0 230 215\"\u003e\u003cpath d=\"M 126.9,43.8 L 104.8,56.5\"\u003e\u003c\/path\u003e\u003cpath d=\"M 104.8,56.5 L 82.9,43.7\"\u003e\u003c\/path\u003e\u003cpath d=\"M 82.9,43.7 L 82.9,23.4\"\u003e\u003c\/path\u003e\u003cpath d=\"M 82.9,43.7 L 60.8,56.4\"\u003e\u003c\/path\u003e\u003cpath d=\"M 82.9,48.1 L 64.6,58.6\"\u003e\u003c\/path\u003e\u003cpath d=\"M 60.8,56.4 L 43.6,46.4\"\u003e\u003c\/path\u003e\u003cpath d=\"M 60.8,56.4 L 60.8,81.8\"\u003e\u003c\/path\u003e\u003cpath d=\"M 60.8,81.8 L 41.3,93.0\"\u003e\u003c\/path\u003e\u003cpath d=\"M 60.8,81.8 L 82.7,94.6\"\u003e\u003c\/path\u003e\u003cpath d=\"M 64.6,79.6 L 82.7,90.2\"\u003e\u003c\/path\u003e\u003cpath d=\"M 82.7,94.6 L 104.8,81.9\"\u003e\u003c\/path\u003e\u003cpath d=\"M 104.8,81.9 L 126.9,94.7\"\u003e\u003c\/path\u003e\u003cpath d=\"M 126.9,94.7 L 126.8,120.2\"\u003e\u003c\/path\u003e\u003cpath d=\"M 123.1,96.9 L 123.0,118.0\"\u003e\u003c\/path\u003e\u003cpath d=\"M 126.8,120.2 L 148.7,133.0\"\u003e\u003c\/path\u003e\u003cpath d=\"M 148.7,133.0 L 148.5,158.4\"\u003e\u003c\/path\u003e\u003cpath d=\"M 144.9,135.2 L 144.7,156.2\"\u003e\u003c\/path\u003e\u003cpath d=\"M 148.5,158.4 L 166.7,169.1\"\u003e\u003c\/path\u003e\u003cpath d=\"M 148.5,158.4 L 126.4,170.9\"\u003e\u003c\/path\u003e\u003cpath d=\"M 124.5,169.8 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L 171.0,90.3\"\u003e\u003c\/path\u003e\u003cpath d=\"M 171.0,94.6 L 173.0,112.8\"\u003e\u003c\/path\u003e\u003cpath d=\"M 177.2,119.6 L 194.5,119.1\"\u003e\u003c\/path\u003e\u003cpath d=\"M 177.1,115.9 L 194.4,115.3\"\u003e\u003c\/path\u003e\u003cpath d=\"M 170.2,115.6 L 158.9,114.3\"\u003e\u003c\/path\u003e\u003cpath d=\"M 169.8,119.3 L 158.5,118.1\"\u003e\u003c\/path\u003e\u003cpath d=\"M 173.4,123.2 L 173.0,138.5\"\u003e\u003c\/path\u003e\u003cpath d=\"M 104.8,81.9 L 104.8,56.5\"\u003e\u003c\/path\u003e\u003cpath d=\"M 101.0,79.7 L 101.0,58.7\"\u003e\u003c\/path\u003e\u003cpath d=\"M 104.7,132.7 L 126.8,120.2\"\u003e\u003c\/path\u003e\u003cpath d=\"M 171.0,94.6 L 148.9,82.0\"\u003e\u003c\/path\u003e\u003cpath d=\"M 81.6,94.0 L 82.7,94.6 L 83.8,94.0\"\u003e\u003c\/path\u003e\u003cpath d=\"M 147.6,132.4 L 148.7,133.0 L 148.7,134.3\"\u003e\u003c\/path\u003e\u003cpath d=\"M 127.5,170.3 L 126.4,170.9 L 125.3,170.3\"\u003e\u003c\/path\u003e\u003cpath d=\"M 148.8,57.9 L 148.8,56.6 L 149.9,56.0\"\u003e\u003c\/path\u003e\u003cpath d=\"M 169.8,44.5 L 170.9,43.9 L 172.0,44.5\"\u003e\u003c\/path\u003e\u003cpath d=\"M 191.7,55.9 L 192.8,56.5 L 192.9,57.8\"\u003e\u003c\/path\u003e\u003cpath d=\"M 193.0,80.6 L 193.0,81.9 L 191.9,82.5\"\u003e\u003c\/path\u003e\u003cg style=\"font:12px sans-serif;fill:#000;stroke:none\"\u003e\u003ctext x=\"82.9\" y=\"22.5\" text-anchor=\"middle\"\u003eBr\u003c\/text\u003e\u003ctext x=\"42.4\" y=\"47.9\" text-anchor=\"end\"\u003eHO\u003c\/text\u003e\u003ctext x=\"35.7\" y=\"98.7\" text-anchor=\"middle\"\u003eBr\u003c\/text\u003e\u003ctext x=\"170.4\" y=\"175.5\" text-anchor=\"middle\"\u003eBr\u003c\/text\u003e\u003ctext x=\"126.2\" y=\"200.5\" text-anchor=\"middle\"\u003eO\u003c\/text\u003e\u003ctext x=\"79.4\" y=\"174.8\" text-anchor=\"middle\"\u003eBr\u003c\/text\u003e\u003ctext x=\"173.6\" y=\"122.1\" text-anchor=\"middle\"\u003eS\u003c\/text\u003e\u003ctext x=\"199.2\" y=\"121.3\" text-anchor=\"middle\"\u003eO\u003c\/text\u003e\u003ctext x=\"154.0\" y=\"119.8\" text-anchor=\"middle\"\u003eO\u003c\/text\u003e\u003ctext x=\"174.9\" y=\"147.8\" text-anchor=\"middle\"\u003eO⁻\u003c\/text\u003e\u003c\/g\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv style=\"display:flex;align-items:center;\"\u003e\u003cdiv style=\"display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:80px;max-width:108px;padding:0 4px;text-align:center;font-size:12px;line-height:1.3;\"\u003e\n\u003cdiv\u003eacidic buffer\u003c\/div\u003e\n\u003cdiv style=\"font-size:30px;line-height:1;\"\u003e⟶\u003c\/div\u003e\n\u003cdiv\u003eextraction into CHCl₃\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-direction:column;align-items:center;background:#fff6cc;border:1px solid #e0b800;border-radius:8px;padding:6px 8px 4px 8px;margin:4px;\"\u003e\n\u003csvg role=\"img\" style=\"max-width:100%;height:auto;\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" fill=\"none\" stroke=\"#000\" 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0.70em; font-weight: bold; letter-spacing: 0.12em; text-transform: uppercase; color: #fff;\"\u003eShipping Destinations\u003c\/h3\u003e\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #e4e8f0; border-top: none; padding: 12px 16px; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 0.95em;\"\u003e\u003cul style=\"margin: 0; padding: 0; list-style: none;\"\u003e\n\u003cli style=\"padding: 5px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cspan style=\"display: inline-block; width: 7px; height: 7px; background: #002147; border-radius: 50%; margin-right: 10px; vertical-align: middle;\"\u003e\u003c\/span\u003eEU \u0026amp; UK: Priority delivery, 2–5 business days.\u003c\/li\u003e\n\u003cli style=\"padding: 5px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cspan style=\"display: inline-block; width: 7px; height: 7px; background: #002147; border-radius: 50%; margin-right: 10px; vertical-align: middle;\"\u003e\u003c\/span\u003eUnited States (DDP): 3–7 business days, duties and taxes prepaid.\u003c\/li\u003e\n\u003cli style=\"padding: 5px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cspan style=\"display: inline-block; width: 7px; height: 7px; background: #002147; border-radius: 50%; margin-right: 10px; vertical-align: middle;\"\u003e\u003c\/span\u003eEFTA Countries (DDP): 3–7 business days, duties and taxes prepaid.\u003c\/li\u003e\n\u003cli style=\"padding: 5px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cspan style=\"display: inline-block; width: 7px; height: 7px; background: #002147; border-radius: 50%; margin-right: 10px; vertical-align: middle;\"\u003e\u003c\/span\u003eWorldwide: 7–14 business days, selected locations.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"NorrChemica™","offers":[{"title":"5.0 g","offer_id":55166597103953,"sku":"NOR-76608-5g","price":39.2,"currency_code":"EUR","in_stock":true},{"title":"10 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